1993400141 has 2 divisors, whose sum is σ = 1993400142. Its totient is φ = 1993400140.

The previous prime is 1993400131. The next prime is 1993400153. The reversal of 1993400141 is 1410043991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1570933225 + 422466916 = 39635^2 + 20554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1993400141 - 2⁶ = 1993400077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1993400098 and 1993400107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993400111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996700070 + 996700071.

It is an arithmetic number, because the mean of its divisors is an integer number (996700071).

Almost surely, 2^1993400141 is an apocalyptic number.

It is an amenable number.

1993400141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993400141 is an equidigital number, since it uses as much as digits as its factorization.

1993400141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1993400141 is about 44647.5099081685. The cubic root of 1993400141 is about 1258.5336391079.

The spelling of 1993400141 in words is "one billion, nine hundred ninety-three million, four hundred thousand, one hundred forty-one".